Sheet-metal-bending machine.



PATENTED SEPT. 11, 1906.

M. D. SADTLER.

TAL BENDING MAOHI APPLIOAIION FILED MAR. 15, 1906.

SHEET ME 2 SHEETS-SHEET 1.

I. EEWI z w i m, 5 M

' aktozneqa WASHINGTON, c. c.

PATENTED SEPT. 1l, 1906.

M. D. SADTLER. SHEET METAL BBNDING MACH INE.

APPLICATION FILED MAR-15,1906.

2 SHEETS-SHEET 2.

NORRI 0, WASHINGTON. n. 4:. n4

7 through which p scribed in connection Unrrn srarns PATENT FFTGE.

MORGAN D. SADTLER, OF BALTIMORE, MARYLAND, ASSlGNOR OF ONE- HALF TO JESSE B. FORRESTER, OF BALTIMORE, MARYLAND.

SHEET-METAL-B Specification of Letters Patent.

ENDING MACHINE.

Patented Sept. 11, 1906.

Application filed March 15, 1906. Serial No. 306,257.

To alt wlwm, it may concern:

Be it known that I, hTORGAN D. SADTLER, a citizen of the United States of America, and a resident of the city of Baltimore and State of Maryland, have invented certain new and useful Improvements in She etMetal-B ending Machines, of which the following is a specification.

My invention relates to certain new and useful improvements in sheetmetalbending machines; and the object of my invention is to improve the class of machines adapted for fianging or bending sheet metal or the like; and the invention consists in the construction and particular arrangement of parts, the preferred form of which will be first dewith the accompanying drawings and then the invention particularly pointed out in the claims.

Referring to the drawings, wherein the same part is designated by the same reference-numeral wherever it occurs, Figure 1 is a perspective view of a metal-bending machine embodying my invention. Fig. 2 is a central longitudinal section of the same. Fig. 3 is a detail sectional view taken on line a: ."c of Fig. 2. Fig. 4 is a detached view of the parts forming the bending edge of the bed. Fig. 5 is a detached perspective view of one end of the bending member.

1 designates the side frames, which are provided with legs 2 2.

3 is a bar extending transversely between the side frames and secured at its ends to the side frames. Preferably and as shown this is effected by providing slots in the side frames, into which the ends of the bar 3 enter, and then providing a means for adjusting the bar in the slots. In the form of my invention shown 1 effect this by providing each of the side frames with an ear 40,

asses a screw 41, the end of the screw engaging a tapped hole in the bar. The screw is shown as provided with a head 42 and a nut 43, the head and nut acting to hold the screw in adjusted position in the cars 40. The purpose of this adjustment will be hereinafter described.

4 is the supporting-table, which forms a bed upon which the sheet is supported during the bending operation. This table is pivoted at one edge to the bar 3. In the form of my invention shown the bar is pro vided with a beveled face 5, which, however,

does not extend the full length of the bar. Adjacent to each end of the bar are cut slots 6, in which extend ears 7, formed on the edge of the table. These ears form one member of the hinge for securing the table to the bar, and, as shown in the drawings, these cars are provided with the perforations 8 and the sides of the slots 6 being provided with perforations 9, so that pins may pass through the side of the slot and the ears to hinge the table to the bar. The table is preferably beveled at 10 011 its under edge between the ears 7 in order to permit of the necessary movement of the table. At its front end the table is suitably supported-as, for instance, by an arm 11, pivoted to the table at 12 and provided with a slot 13. 14 is a bolt adapted to extend through the slot and engage with a threaded opening in the legs 2 2. Preferably one of thesearms is provided on each side of the table, and it will be seen that by loosening the bolts the front end of the table may be raised or lowered and when in position may be held there by tightening up the bolts 14.

Preferably and as shown the rear face of the bar 3 is provided with a serrated face 15, to which is secured a bar 16, provided on its inner face with similar serrations. The bar 16 is of less length than the distance between the projecting ends of the bar, in which are cut the slots 6, thus leaving a channel or way 17 near each end of the bar. The bar 16 is of less width than the width of the bar 3 and is so placed on the end of the bar 3 as to be flush with the lower edge of the bar.

18 is a bar slightly less in width than the distance between the top of the bar 16 and the top of the bar 3. This bar 18 is provided with downwardly-projecting ears 19, in which are formed slots 26. The rear face rated, as shown. 21 represents tapped holes in the bar 3 and so located as to register with the slots 20. 22 is a bolt adapted to pass through the slots 20 and into the tapped holes 21. By this means the bar 18 can be held in position and its upper face adjusted into proper relation with the table 4.

At the rear end of the side frames 2 are provided vertical uprights 23, in which are mounted the movable portions of the bendj ing device. These uprights 23 are each provided with a slot 24, throughwhich extend of the depending cars 19 are preferably serthe ends of the bending-bar 26. Preferably and as shown in dotted lines in Fig. 3 the working edge of the bar is inclined so as to cause it to bend the metal with a shearing action. This bar extends between the up rights 23 and is provided on its end with guiding-faces 27, adapted to enter guide- Ways 28. (Shown in dotted lines in Fig. 3.) Preferably, and as shown, the extension 25 is formed as an offseton the lower edge of the bar 26.

29 represents springs one end of each of which is secured to the bar 26, with the other 1 end secured to pins 30 or the like projecting from the uprights 23. The purpose of these springs is merely to raise the bar after the bending operation.

31 represents ears formed in the offset portion of the bar 26, and to these ears are pivotally attached one end of the rods 32 32, the other end of the rod being pivotally secured to a treadle 33, which is pivotally mounted upon a bar 34, extending between the legs 2 2. when the treadle is depressed the bar 26 is drawn downward. The lower edge of the bar is so located with relation to the stationary portion of the bender as to just pass its edge, as best shown in Fig. 2, there being only sufficient clearance between the face of the bar 18 and the edge of the bar 26 for the metal to be bent. By the adjustment of the .bar by means of the screws 41 this clearance can be adjusted in accordance with the thickness of the metal to be operated thereon.

In order to hold or clamp the metal during the bending operation, I provide a bar 35, which is provided with upwardly-extending guide-pins 36, which in turn pass through guiding-lugs 37, secured to the front face of the bar 26. 38 represents springs interposed between the top face of the bar 35- and the end face of the lugs 37. The bar 35 extends below the bending edge of the bar 26 and when the bending member is depressed permits the bar 26 to pass down and yet hold the bar 35 firmly against the metal to be operated on.

It is to be understood that the table 4 is to be provided with the usual gages and guides; but as these form no part of the invention it is not deemed necessary to illustrate the same.

In the operation of my device the table 4 is set at an angle to correspond to the angle at which it is desired to bend the metalthat is to say, if it is desiredto form the metal with a right-angled bend the table is set so that it is horizontal. If more than a right-angled bend is required, the table is elevated above the horizontal the desired amount, and if less than a right angle is desired the table is lowered below the horizontal the desired amount. After the table has been set in proper position the metal is moved on the bed 4 until its edge extends over the edge of By this connection it will be seen that the bar 18 a distance equal to the desired width of the flange. The treadle is now operated, which acts to pull down the bar 26 and the bar 35. The bar 35 comes in contact with the face of the sheet of metal before the lower edge of the bar 26. Consequently the sheet will be firmly clamped before the bending operation commences. When the lower edge of the bar 26 comes in contact with the metal, it will bend the same down, and when the bar has been fully depressed by the operation of the treadle the metal will be bent to the desired angle. By having the frontedge of the bar 3, which receives the strain of the bending operation, adjustable various thicknesses of metal may be bent, and this adjustment insures the proper relation between the bending parts.

While I have described my invention in connection with a machine for bending sheet-metal plates, it is obvious that it may be used to bend any kind of sheet material as may be found desirable.

While I have described what I believe to be the preferred form of my invention, I desire to have it understood that many changes may be made in the form, construction, and arrangement of parts without departing from the spirit of my invention.

Having thus described my invention, what I desire to claim as new, and desire to secure by Letters Patent, is-

1. In a sheet-metal-bending machine, the combination with a bar adapted to support the edge of the metal, of a bed pivoted to the bar, and means for permitting the adjustment of the bed to various bending member adapted to cooperate with the edge of said bar to bend the metal, and means for moving said bending member past the edge of the bar to bend the metal, the adangles, a movable justment of said bed operating to vary the angle of said'bend.

2. In a sheetmetal-bending machine, the combination with a bar provided with an adjustable bending edge, a supporting-bed pivotally attached bending member adapted to cooperate with the edge of the bar, said machine being adapted to bend metal to various angles determined by the adjustment of the bed 3. In-a sheet-metalbending machine, the combination of a reciprocating bending-bar, a bar normally horizontal, a bed pivoted to the bar, means for adjusting the bar toward and away from the path of the bending-bar, a spring-pressed bar mounted on the reciprocating bending-bar and adapted to precede the bending-bar and clamp the metal before the bending-bar begins to act upon the metal. v 4. In a sheet-metal-bending machine, the combination of a reciprocating bending-bar having an inclined edge, a bar normally horizontal, a bed pivoted to the bar, means for adjusting the bar toward and away from the to the bar, and a movablepath of the bending-bar, a'spring-pressedjbar from the path of the bending member to admounted on the reciprocating bending-bar just the same in accordance with the thickand adapted to precede the bending-bar and ness of the metal to be operated on.

clamp the metal before the bending-bar be- I Signed by me at Baltimore, Maryland, this 5 gins ti) act lllpOIl the nrliegtal.1 h h 1 12th day of March, 1906.

5. n a s leet-meta enc in mac ine t e combination with a bar carrfing a supporti MORGAN SADTLER' ing-bed, a movable bending member adapted l to cooperate with the edge of the bar and I 10 means for adjusting the bar toward and away WVitnesses GEO. W. I-IAULENBEEK, JOHN EMORY CROSS. 

